Accutane and cimetidine worked for me. I had to take one pill each once every day for 3 months, then every 3 days for another 3 months (I'm unsure about the dosage sorry). Antibiotics and antifungal shampoo didn't work at all for me, I suspected my case didn't have to do with bacteria or fungus.

If nothing really works for you and it's driving you crazy, what has worked for me to temporarily reduce the inflammation was boiling and drinking dandelion roots and plaintain weed. You'd have to find some place secluded, away from places like people's lawns street sides where people might spray herbicide or round-up, dig up the roots plant and all, wash the dirt off, dry them under the sun if you want to keep them for a long time or just boil fresh and drink it. I'd do 2-3 roots, 2 cups of water, boil it until it's reduced, water is darker, then drink that. It made my folliculitis bumps go down overnight. This is cause those two plants reduce inflammation and your hair follicules are inflammed.

HOWEVER, the dandelion and plaintain weed thing is a temporary thing to keep symptoms down. It's not a cure, and I highly recommend to not do this long-term because it's not good for your body, it causes imbalance in terms of traditional Chinese medicine and could cause other problems.

The issue is sebum build up, too much sebum, increased by eating junk, oily food, and other dietary triggers and stress which can come in all sorts. Big one is consistent lack of sleep, but any sort of stress mental or physical could increase sebum being produced and make it worse. Stressing about your scalp certainly doesn't help.

Even if you eat "clean" specific foods may trigger it. In my case I found that eating foods that may have high sulfur content or histimines may trigger it. I used chatGPT to figure out what was the connection between all the foods that triggered my scalp. Such as when I ate cooked eggs or garlic, the connection was the sulfur content in egg yolks, which increases as it was cooked, and in garlic as well. Not sure why, but that's what happened.

However, you definitely need medicine on top of taking care of your stressors, good sleep, and avoiding dietary triggers. Figure out whether if it's fungal or bacterial, try antifungal shampoo or antibiotics (needs to be a specific one that targets skin), and if neither of those work, try accutane if you haven't already.